vbfgh

Dependencies:   BLE_API HCSR04 X_NUCLEO_IDB0XA1 mbed

Fork of BLE_LED_Button_Nucleo by Jan Jongboom

Embed: (wiki syntax)

« Back to documentation index

Show/hide line numbers main.cpp Source File

main.cpp

00001 /* mbed Microcontroller Library
00002  * Copyright (c) 2006-2013 ARM Limited
00003  *
00004  * Licensed under the Apache License, Version 2.0 (the "License");
00005  * you may not use this file except in compliance with the License.
00006  * You may obtain a copy of the License at
00007  *
00008  *     http://www.apache.org/licenses/LICENSE-2.0
00009  *
00010  * Unless required by applicable law or agreed to in writing, software
00011  * distributed under the License is distributed on an "AS IS" BASIS,
00012  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
00013  * See the License for the specific language governing permissions and
00014  * limitations under the License.
00015  */
00016 
00017 #include "mbed.h"
00018 #include "ble/BLE.h"
00019 #include "LEDService.h"
00020 #include "ButtonService.h"
00021 #include "hcsr04.h"
00022 #define LED_ON          0
00023 #define LED_OFF         1
00024 
00025 DigitalOut alivenessLED(LED1, LED_OFF); // green
00026 DigitalOut actuatedLED(LED2, LED_OFF);  // red
00027 InterruptIn button(PC_13);
00028 HCSR04 usensor(D14,D15);
00029 const static char     DEVICE_NAME[] = "vs_device";
00030 static const uint16_t uuid16_list[] = { 
00031     LEDService::LED_SERVICE_UUID, 
00032     ButtonService::BUTTON_SERVICE_UUID
00033 };
00034 
00035 LEDService *ledServicePtr;
00036 ButtonService *buttonServicePtr;
00037 
00038 Ticker ticker;
00039 
00040 void periodicCallback(void)
00041 {
00042     alivenessLED = !alivenessLED; /* Do blinky on LED1 to indicate system aliveness. */
00043 }
00044 
00045 void disconnectionCallback(const Gap::DisconnectionCallbackParams_t *params)
00046 {
00047     BLE::Instance().gap().startAdvertising();
00048     
00049     ticker.attach(periodicCallback, 1);
00050 }
00051 
00052 void connectionCallback(const Gap::ConnectionCallbackParams_t * params)
00053 {
00054     // stop blinking when we connect
00055     ticker.detach();
00056     // also put the led off
00057     alivenessLED = LED_OFF;
00058 }
00059 
00060 /**
00061  * This callback allows the LEDService to receive updates to the ledState Characteristic.
00062  *
00063  * @param[in] params
00064  *     Information about the characterisitc being updated.
00065  */
00066 void onDataWrittenCallback(const GattWriteCallbackParams *params) {
00067     // handle corresponds to the characteristic being written
00068     // then we can read data to get a buffer of the actual data
00069     if ((params->handle == ledServicePtr->getValueHandle()) && (params->len == 1)) {
00070         // When writing 1 -> turn LED on, 0 -> turn LED off
00071         char val = params->data[0];
00072         actuatedLED = val == 1 ? LED_ON : LED_OFF;
00073     }
00074 }
00075 
00076 /**
00077  * This function is called when the ble initialization process has failed
00078  */
00079 void onBleInitError(BLE &ble, ble_error_t error)
00080 {
00081     // blink fast when we encountered an error
00082     ticker.attach(periodicCallback, 0.2);
00083 }
00084 
00085 /**
00086  * Callback triggered when the ble initialization process has finished
00087  */
00088 void bleInitComplete(BLE::InitializationCompleteCallbackContext *params)
00089 {
00090     BLE&        ble   = params->ble;
00091     ble_error_t error = params->error;
00092 
00093     if (error != BLE_ERROR_NONE) {
00094         /* In case of error, forward the error handling to onBleInitError */
00095         onBleInitError(ble, error);
00096         return;
00097     }
00098 
00099     /* Ensure that it is the default instance of BLE */
00100     if(ble.getInstanceID() != BLE::DEFAULT_INSTANCE) {
00101         return;
00102     }
00103  
00104     ble.gap().onDisconnection(disconnectionCallback);
00105     ble.gap().onConnection(connectionCallback);
00106     ble.gattServer().onDataWritten(onDataWrittenCallback);
00107 
00108     // Begin - If you add a new service, add it here!
00109     ledServicePtr = new LEDService(ble, false /* inital value */);
00110     buttonServicePtr = new ButtonService(ble, false /* initial value */);
00111     // End - If you add a new service, add it here!
00112 
00113     ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::BREDR_NOT_SUPPORTED | GapAdvertisingData::LE_GENERAL_DISCOVERABLE);
00114     ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LIST_16BIT_SERVICE_IDS, (uint8_t *)uuid16_list, sizeof(uuid16_list));
00115     ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LOCAL_NAME, (uint8_t *)DEVICE_NAME, sizeof(DEVICE_NAME));
00116     ble.gap().setAdvertisingType(GapAdvertisingParams::ADV_CONNECTABLE_UNDIRECTED);
00117     ble.gap().setAdvertisingInterval(50); /* 50ms. Hack for EvoThings. */
00118     ble.gap().startAdvertising();
00119 }
00120 
00121 void button_down() {
00122     if (!buttonServicePtr) return;
00123     buttonServicePtr->updateButtonState(usensor.get_dist_cm());
00124 }
00125 void button_up() {
00126     if (!buttonServicePtr) return;
00127     
00128 }
00129 
00130 int main(void)
00131 {
00132     // Blink the green LED!
00133     ticker.attach(periodicCallback, 1);
00134     usensor.start();
00135     button.fall(&button_down);
00136     button.rise(&button_up);
00137     
00138     BLE &ble = BLE::Instance();
00139     ble.init(bleInitComplete);
00140 
00141     /* SpinWait for initialization to complete. This is necessary because the
00142      * BLE object is used in the main loop below. */
00143     while (ble.hasInitialized()  == false) { /* spin loop */ }
00144 
00145     while (true) {
00146         ble.waitForEvent();
00147     }
00148 }